A fine overview from Spain of the best new projects. The selection of 24 works reflects commitments to sustainability, materialised in buildings which use resources more efficiently. This includes refurbishments like Ombú for Acciona by Foster + Partners in Madrid and Palace-House by Tuñón & Albornoz in Cáceres. Nieto Sobejano and Alcolea, Ercilla, and Tárrago.  Each project is a celebration - of material, of light and of invention.